Apple released macOS Catalina 10.15.6 Supplemental Update on August 12, 2020, to fix a couple of bugs related to virtualisation software.
- Fixes a stability issue that could occur when running virtualisation apps
- Resolves an issue where an iMac (Retina 5K, 27-inch, 2020) may appear washed out after waking from sleep
To install the update, click on Apple Menu >> About This Mac >> Software Update >> Install Now. This update is 2.8GB and requires you to restart your Mac. For more details about how to install the update on Mac, click on the below link
How to Download and Install macOS Catalina 10.15.6 on your Mac
Last Updated: August 17, 2020